After not getting any offers to purchase a matching yoke (which I believe is original) I still needed to get my passenger side emergency brake cable hooked up as I am really close to getting her on the road. I looked in the “Truck Factory Assembly Manual” and I noticed that my cross shaft outer levers were adjusted incorrectly. As per the manual the levers should be adjusted so that are pointing toward the back 7 degrees from vertical. Mine were pointing in the opposite direction. Making this adjustment looked like it may enable me to use the shorter yoke that I already have. I looked at my truck and it appeared to have enough adjustment to enable me to split the difference and use both the longer and shorter yokes.
Of course every part was frozen solid by rust, including the cotter pin, the clevis pin and the locking nut and finally the yoke. After soaking the assembly in penetrant for several hours, piece by piece I was able to get it apart after spending 1-1/2 hours of elbow grease and the best tool in my tool box, finesse. Something I learned during my 40 year career as a machinist.
In order to obtain enough cable thread penetrating the yoke I may have stretched that 7 degrees, but I now have a working emergency brake.
One more thing to note. The short replacement yoke that came with the truck, has a 12 mm nut size. The thread is American standard 5/16 NF but the nut is still metric. So, I will continue to be on the lookout for the correct yoke. I am not a purist by any means but if you remanufacture an American made part, keep it all American.